<template>
  <div class="xtx-cart-page">
    <div class="container m-top-20">
      <div class="cart">
        <table>
          <thead>
            <tr>
              <th width="120">
                <XtxCheckbox :modelValue="$store.getters['cart/checkAll']" @change="(selected)=>allChecked(selected)">全选</XtxCheckbox>
              </th>
              <th width="400">商品信息</th>
              <th width="220">单价</th>
              <th width="180">数量</th>
              <th width="180">小计</th>
              <th width="140">操作</th>
            </tr>
          </thead>
          <!-- 有效商品 -->
          <tbody>
            <tr v-for="i in cartList" :key="i.id">
              <td>
                <!--原因：
                通过v-model双向绑定 vuex中的数据
                v-model 第三步 事件被你触发时 直接把事件参数赋值给v-model绑定的数据
                当你用v-model 事件参数 会绕过mutation函数 直接对vuex中的数据进行修改

                解决：
                核心思路：不用v-model不就可以了 v-model 对传统父子通信手段的一次封装
                回归到传到的父子通信手段 实现当前的功能-->
                <XtxCheckbox :modelValue="i.selected" @change="(selected)=>selectChange(i, selected)" />
              </td>
              <td>
                <div class="goods">
                  <RouterLink :to="`/goods/${i.id}`"><img :src="i.picture" alt=""></RouterLink>
                  <div>
                    <p class="name ellipsis">{{i.name}}</p>
                    <!-- 选择规格组件 -->
                  </div>
                </div>
              </td>
              <td class="tc">
                <!-- 单价 -->
                <p>&yen;{{i.price}}</p>
                <p v-if="i.price - i.nowOriginalPrice>0">
                  比加入时降价
                  <span class="red">&yen;{{ i.price - i.nowOriginalPrice }}</span>
                </p>
              </td>
              <td class="tc">
                <!-- 数量 -->
                <XtxNumBox :modelValue="i.count" :isLabel="false" @change="(val)=>changCount(i,val)" />
              </td>
              <!-- 小计 -->
              <td class="tc">
                <p class="f16 red">&yen;{{(i.count*i.price).toFixed(2)}}</p>
              </td>
              <td class="tc">
                <p><a class="green" href="javascript:;" @click="delGood(i.skuId)">删除</a></p>
              </td>
            </tr>
          </tbody>
        </table>
      </div>
      <!-- 操作栏 -->
      <div class="action">
        <div class="batch">
          共 {{allCount}} 件商品，已选择 {{selectedCount}} 件，商品合计：
          <span class="red">¥{{seletedPrice.toFixed(2)}}</span>
        </div>
        <div class="total">
          <XtxButton type="primary" @click="downOrder">下单结算</XtxButton>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import { useStore } from 'vuex'
import { computed } from 'vue'
import Message from '@/components/Message/index.js'
import { useRouter } from 'vue-router'
export default {
  name: 'XtxCartPage',
  setup () {
    const store = useStore()
    const cartList = computed(() => store.state.cart.cartList)
    const allCount = computed(() => store.getters['cart/allCount'])
    const selectedCount = computed(() => store.getters['cart/selectedCount'])
    const seletedPrice = computed(() => store.getters['cart/seletedPrice'])
    // 封装一个改变商品选中状态的函数
    function selectChange (item, selected) {
      // console.log(item, selected)
      // store.commit('cart/setSelected', { skuId: item.skuId, selected })
      store.dispatch('cart/updateSelected', {
        skuId: item.skuId,
        count: item.count,
        selected
      })
    }
    // 封装一个全选反选的函数
    function allChecked (selected) {
      store.dispatch('cart/isAll', selected)
    }
    // 改变数量
    function changCount (item, val) {
      store.dispatch('cart/updateSelected', {
        skuId: item.skuId,
        count: val,
        selected: item.selected
      })
    }
    // 删除商品
    async function delGood (id) {
      await store.dispatch('cart/delGoods', [id])
      Message({ type: 'success', text: '删除成功！' })
    }
    const router = useRouter()
    // 下单结算
    function downOrder () {
      // 判断用户是否有要结算的商品
      if (selectedCount.value > 0) {
        // 下单结算
        router.push('/settle')
      } else {
        Message({ text: '请先选中商品', type: 'warn' })
      }
    }
    return { cartList, allCount, selectedCount, seletedPrice, selectChange, allChecked, changCount, delGood, downOrder }
  }
}
</script>
<style scoped lang="less">
.tc {
  text-align: center;
  .xtx-numbox {
    margin: 0 auto;
    width: 120px;
  }
}
.red {
  color: @priceColor;
}
.green {
  color: @xtxColor;
}
.f16 {
  font-size: 16px;
}
.goods {
  display: flex;
  align-items: center;
  img {
    width: 100px;
    height: 100px;
  }
  > div {
    width: 280px;
    font-size: 16px;
    padding-left: 10px;
    .attr {
      font-size: 14px;
      color: #999;
    }
  }
}
.action {
  display: flex;
  background: #fff;
  margin-top: 20px;
  height: 80px;
  align-items: center;
  font-size: 16px;
  justify-content: space-between;
  padding: 0 30px;
  .xtx-checkbox {
    color: #999;
  }
  .batch {
    a {
      margin-left: 20px;
    }
  }
  .red {
    font-size: 18px;
    margin-right: 20px;
    font-weight: bold;
  }
}
.tit {
  color: #666;
  font-size: 16px;
  font-weight: normal;
  line-height: 50px;
}
.xtx-cart-page {
  .cart {
    background: #fff;
    color: #666;
    table {
      border-spacing: 0;
      border-collapse: collapse;
      line-height: 24px;
      th,
      td {
        padding: 10px;
        border-bottom: 1px solid #f5f5f5;
        &:first-child {
          text-align: left;
          padding-left: 30px;
          color: #999;
        }
      }
      th {
        font-size: 16px;
        font-weight: normal;
        line-height: 50px;
      }
    }
  }
}
</style>
